System of fuel regulation.



H. LEMP. SYSTEM OF FUEL REGULATION. APPLICATION FILED JAN. 13, 1902.

Patented Oct. 5, 1909.

P m e L h n a P e v .HLUJ a WVITNEISSE 5.

, citizen of the Ynit ed :States, residing at i tion, of which the with, and controlled by the throttle valve 2,

. other equivalent devices. Onaccount of eco-' effecting this same purpose.

" less protracted stop, is insuflicient for steam- To all uihom it concern:

setts, have invented certain new and useful carbon is used its-fuel, and its'object'is to .ma-intained under-a constant definite pres mainfuel tank to other than atmospheric :p'ressure ln this way I avoid storing a.

other fuel or'its sudden discharge in case of generator of the flasher type.

the pump should yary in speed with the enploying a flash boiler that the amount of UNITED STATES;

PATENT oFFIoE. I

*HERMANN LEMP, or LYNN, MASSACHUSETTS, ASSIGNQR, BY ivr'nsnn ASSIGNMENTS, 130' GE ERA ELECTRIC COMPANY, A CORPORATION or new your;

s zsT M "or FUEL REGULATION.

; Be it known that I, TIERMANN LnMP, a.

Lynn, county of Essex, State of Massachu- Improvements in Systems of Fuel Regula following is a specification. Y

The present invention relates to. steamgenerating systems in which a liquid hydroprovide a system of/fuel regulation for hydrocarbon urners whereln the supply is sure at the burner, withoutsubjecting the large quantity of liquid fuel under an air pressure. varying from thirty to fifty pounds per square inch, and thus escape thedaiiger due to possible leakageiof the gasolene or a broken pipe.

. In-the accompanying drawing I have diagrammatically illustrated an embodiment of my invention in ,connection with a steam 1 represents a boiler, and connectedthere" is an engine 3. Water is supplied to the boiler by a pump ft, the latter being driven from the engine by sprockets and chains or nomical considerations it is preferable that gine, but it can be driven from an inde endent source of power. The pump is capa le of delivering at all times the maximum amount of Water required by the boiler, and when the demand decreases a suitable regulating device is provided to take care of the excess.

the- Water end'of the boiler exceeds a predetermined amount. It is obvious that other and equivalent means may be employed for It frequently happens with a system emwater contained in the boiler, after a more or ing purposes. To obviate this I provide amanually-actuated pump 22, which is used momentarily at starti-ng- It is c'onnectedin series with the power pump t, and 1ts dehvl Specification of Letters Patent,

' Patented Oct. 5, 1909.

- Application filed January 13, 1902. Serial/No. 89,463.-

ery may be added to that of the latter whenever it be found desirable, as for example when-the ad is particularly heavy for a brief interval. f 1 Situated in operative relation to the boiler 1s a combined vaporizer and burner 6, adapt ed to consumehydrocarbon vapor; it may be of any suitable construction. The fuel is contained in. a tank 7, that works at or about atmospheric pressure, and said tank is connected-by the pipe 8 with an auxiliary fuel tank 9, containing air .under pressure. The fuel tank isprefera'bly, although not necessarily,.placed above theburner so that fuel will flow by gravity thereto. Such an arrangementis desirable for starting the system into operation. In series relation with the -tanks-is a fuel pump 10, of the ordinary displacement type, which increases the fuel gine which receives steam from the boiler ,and drives the water pump, as it makes the whole system more flexible and dispenses with secondary motive devices; it also reduces the number of controlling devices required in starting and stopping the system. The pump-is provided with the usual suction and discharge valves. shunting the pump is a by-passconriectionlQ, containing a valve 13. The ends of thepipes forming the by-pass connection. enter the lower portion of the auxiliary tank 9, which portion is made detachable to permit of machining and also to enable the parts to be assembled in place. The valve 13- is provided with" two seats and is double acting, when the valve is in the position shown, the continuity of the by-pass connection is interrupted and fuel from the pump is delivered to the auxil-.

Onthe other haInd, when I closes the bypass. The float 14 is mounted on an extension of the rod carrying the valves 13,. which rod is guided above and below the valves by bearings 21. The auxiliary tank 9 is small as compared to the main fuel tank, and the contents thereof are placed under such. an air pressure as is suit able to force fuel into the burner under all conditions of operation. For this purpose an air pump 15 is provided, and connected between the pump and the tank is a pressure gage 16. The air pump may with advantage be actuated by hand, since once the tank 9 is subject to pressure it will remain so for a long time. I do not, however, exclude from my invention power pumps for accomplishing this result. Between the gage and the pump is a valve 17, for preventing the escape of air from the tank 9 after the pump has ceased working. The tank may with advantage be placed under an initial pressure, and when the fuel pump 10 is started into operation the pressure will be increased to the predetermined maximum. When this point is reachedthe level of thefiuid will be such that the valve is lifted from its seat and the pump will be by-passed, and thus cease to deliver fuel to the tank.

Connected to the auxiliary tank Ois a pipe 18, which opens intothe vaporizer and burner; and located in the pipe between the tank and burner is a valvelt) for manually controlling the fuel supply to the burner. In addition to acting as a limiting device for the passage offuel to the'rburner, ,the valve is used tointerrupt the supply and maintain the pressure in the auxiliary tank when the operation of the system is discontinued. Between the pipe 8 leading from the main tank and the pipe 18 leading from the auxiliary tank' is a connection containing 'a check valve 20, the latter being arranged. to open only toward the burner. The object in this check valve is topermit fuel to flow by gravity from the tank 7 to the burner for the purpose of starting, and at the same time prevent fuel from working back to the tank when the pressure on the burner side exceeds that on the tank side.

In starting the system into operation the valve 1.9 is opened to admit fuel to the vaporizer and burner. If there is no pressure on the tank 9-, fuel will flow by gravity from i engine by means of the throttle. The en-' gine being connected to thepumps will maintain the necessary supply of fuel and water. In case the boiler does not contain sufficient water for steaming purposes, the manually actuated pump 22 is brought into service delivery for the pump.

for a brief period. Inasmuch as the water pumpand fuel pump are both mechanically connected with and driven by the engine, it

follows that the whole system of fuel and water supply and regulation is practically under the control of the throttle valve 2.

The regulation of the fuel supply is exceedingly close because the difference be pressure in'the auxiliary tank due to the air pump, and the pressure of the fuel system due to the fuel pump.

My invention is particularly useful in connection with self-propelled vehicles, but is not limited thereto, since it can be used in connection with various other power systems.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the ,best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the United States, is,

1, In a system of fuel regulation, the combination of a fuel tank working at or about atmospheric pressure, a burner, anauxiliary I fuel tank supplied from the first, a pump for increasing the pressure of the fuel supplied v to the auxiliary tank, a by-pass valve for regulating-the pump, and a float which is acted upon by the fluid level in the auxiliary tank for operating the bypass valve to regulate the delivery of the pump.

2. In a system of fuel regulation, the comhination of a fuel tank,,an auxiliary tank working under pressure, a burner'receiving fuel from the auxiliary tank, a ump for increasing the fuel pressure in tne auxiliary tank, and a means for closing the auxiliary fuel tank against the delivery of the pump and'simultaneously opening another delivery for the pump under certain conditions.-

3. In a system of fuel regulation, the

combination of a fuel supply tank,- an auxiliary tank receiving fuel from the-first, a pump ,forplacing the contents of the auxiliary tank under air pressure, a pump for maintaining a difference in ressure between the tanks, and means for -c osing the auxiliary'tank against the delivery of the second pump and simultaneously opening another 4:. In icornbina tion'; a fuel tank, a fuel' pump connected thereto, an auxiliary fuel tank which is fed by the pump, a by-pass tank and which is connected to hematite around the-pump, and a valve which closes "the entrance to the auxiliary opens the by-pa'ss under certain conditions. it 5. Incombination,

, anda float located within the auxiliary tank for cutting said tank into and out of connecburner,

tion with the pump and simultaneously closingand opening another delivery for'the pump" v 1 .6. In a fuel system, the.- combination of a a fuel tank which is in ermanent connection withthe burner, a fue pump arranged to deliver fuel to the tank under pressure, and a valve which automatically closes the tank against the pump and opens another delivery for said 'pump when the supply in the tank reaches a predetermined amount.

7 In a steam 'enerating system, the combination of a boil er, a burner for mating the boiler, 'a fuel tank, an auxiliary fuel-tank,

a conduit leading from the auxiliary tank to the'burner, a pump for taking fuel from the first tank and supplying it to the second under pressure, a' float-valve in the auxiliary tank for by-passing the pump, an engine for d-1'i\-'ing.tl1e pump which receives steam from the boiler, and a throttle valve for the engine which controls the operation of the system. 1

8". In combination, a burneg, a fuel tank, a connection between the tank and the I burner, a pump arran ed to create a pressure within the tank, a va ve, and means for automatically actuating thewalve to cut the pump into and out of communication with v vburner, a fuel tank working at or about atmospheric pressure, a' burner, a

' the pressure of the fuel p and to the' with the latter to control t e ling motor and a re ief the' tank and simultaneouslydisconnectand connectit with another delivery. y system, the combination of a a source of liquid fuel supply, an auxiliafuel tank, a

pump for forcing fuelinto sai tank, a;pump for'creatin .an air v pressure in said elivery into said tank, and a means whlch is governed by said tank for actuating the valve.

10. In a motor vehicle, a vehicle-propelling motor, a boiler connected therewith, a

fuel reservoir and a pump supplied there from, means to operate the pum from said motor, a burner with'which t pipe of the pump is connected, :1 p'rwsure chamber connecting with said pump delivery, means responsive to changes in the quantity of fuel'in said'chamber for posi-,

tively opening and closin communication pump deliver-y to said burner inde ndently of' the prope device for the pump. 11. In a motor vehicle,- a propelling motor for said vehicle, a boiler connected with said motor,- a burner, a fuelreservoir, aj pump connected with said reservoir and delivering tosaid burner, means to operate the pump from said motor, a pressure chamber *con nected with the pump delivery, a by-pass around said pump, and a pressure regulator which controls said by-pass and positively opens and closes communication between the pressure chamber and the pump whereby a constant pressure may be maintained in said pressure chamber.. In witness whereof, I V my hand this tenth da of January, 1902. H RMANN LEMP. lVitnesses:

DUGALD McK. McKILLor, JOHN J. WALKER.

e delivery have hereunto settank, 'a'valve contro lin the the varying level of the fuel in I 

